Get ‘charged Up’ For Your Installations
SDM Magazine 5-Minute Tech Quiz, October 2013
- 1.Typical burglar alarm systems can usually be powered by any of the following types of power supplies except
- A.
24VAC
- B.
12VDC
- C.
6VDC
- D.
24VDC
- 2.A 7aH battery is designed to deliver
- A.
1 amp of power for 7 hours.
- B.
7 amps of power for 1 hour.
- C.
1.75 amps of power for 4 hours.
- D.
All of the above
- E.
None of the above
- 3.Battery calculations should always allow for a little extra power in calculating loads. That extra power is usually
- A.
5 percent
- B.
10 percent
- C.
15 percent
- D.
20 percent
- E.
What are you talking about? You size batteries based on load!
- 4.A diode is used to
- A.
Add resistance to a circuit for supervision.
- B.
Limit current flow to one direction.
- C.
Retain power storage for later use.
- D.
All of the above
- E.
None of the above
- 5.The color code on a 42K Ohm resistor would be
- A.
Red, red, black
- B.
Red, yellow, black
- C.
Yellow, red, orange
- D.
Orange, orange, black
- 6.Which of the following would not be considered an over-current protection device?
- A.
Resistor
- B.
Fuse
- C.
Circuit Breaker
- D.
PTC
- 7.LEDs are
- A.
Liquid Energy Diverters
- B.
Lighting Electrical Devices
- C.
Light Emitting Diodes
- D.
Light Energy Directors
- 8.Exceeding the manufacturer’s listed draw on aux power by less than 10 percent is acceptable because they underrate the power supply for that purpose.
- A.
True
- B.
False
- 9.Which of the following statements is true?
- A.
Using an underrated transformer with larger wire is acceptable.
- B.
Using an overrated transformer with smaller wire is acceptable.
- C.
A properly sized transformer with a 24/4 wire doubled up is acceptable.
- D.
Transformers should be matched to the panel power supply specified by the manufacturer.
- 10.Current flows with the least amount of resistance through which wire?
- A.
22AWG
- B.
24AWG
- C.
18/2AWG
- D.
6AWG
- 11.Which of the following is a resettable device?
- A.
LED
- B.
Fuse
- C.
Circuit Breaker
- D.
Fixed temperature fire alarm thermostat
- 12.Amperage and voltage are the same.
- A.
True
- B.
False
- 13.Which of the following is correct?
- A.
420mA+1A+0.6A=2.02A
- B.
5A+600mA+1.2A=12.2A
- C.
0.300A-1.2A+3200mA=4.7A
- D.
(3x1.2A)-400mA=4A
- 14.Which of the following will provide power for the greatest amount of time?
- A.
2 8 volt, 12 Amp batteries wired in series
- B.
2 12 volt, 8 Amp batteries wired in parallel
- C.
4 24 volt, 4 Amp batteries wired in parallel
- D.
4 4 volt, 24 Amp batteries wired in parallel
- 15.A UPS
- A.
Is a delivery service used for packages.
- B.
Is backup battery power supply that engages during a light and power source outage and has a limited amount of current it can deliver.
- C.
Is a power supply that is used to provide regular, steady and unlimited power.
- D.
Require any batteries and runs completely off utility power.
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